I have created and posted on the MasterTemplate website (http://www.archicadtemplate.com) a free 23 minute video showing how to easily create sculpted rafter tails using a clever combination of Complex Profiles and Solid Element Operations (SEO). This design detail is shown in context using the Sample Project included in MasterTemplate.

A simple wall, roof and tilted beam are drawn, and SEO quickly carves them into shape. Later, an entire roof system is modeled in a few minutes using RoofMaker and systematic application of these techniques. In a final flourish, I change the shape of the rafter tails for the entire project in just a few seconds.